Question

State whether true or false:

Lenz's law is used to determine the magnitude of emf induced in the coil.

• A. True
• B. False

Answer 1

The correct option is B False

We can say that the magnitude of the emf induced in the circuit is proportional to the rate of change of flux.
$ϵ\propto \frac{d\varphi }{dt}$
Lenz's law states that when an emf is generated by a change in magnetic flux according to Faraday's Law, the polarity of the induced emf is such, that it produces a current whose magnetic field opposes the change which produces it.
Therefore, Lenz's law can be used to determine the direction of emf induced in the coil but not its magnitude.